Yuzuki, who lives alone, meets Nao, a married woman, at a local izakaya one day. They end up sitting together after Nao, who is going through a rough patch with her husband, seems lost and alone. This chance encounter blossoms into a friendship, and eventually, they begin a physical relationship. Yuzuki gives Nao a spare key to his apartment, and Nao, after her husband leaves for work, starts heading over with shopping bags in hand. To fill the void left by the growing distance between her and her husband, she finds solace in spending intimate moments in Yuzuki's younger apartment...
